Carburetor reservoir



y 13, 1930- E. A. WINFIELD 1,758,068

CARBURETOR RESERVOIR Filed June 26, 1928 fizyeniar Edvardfl Win/laid .4 Ziorzzezy.

Patented May 13, 1930 UNITED STATES EDWARD A. WINIEIELD, OF'LA CANADA, CALIFORNIA CARIBURETOR RESERVOIR Application filed June 26,

This invention relates generally to carburetors and is particularly concerned with float and valve regulating devices for use in carburetor reservoirs or float bowls.

In the operation of the usual type of carburetor float valve difliculty is experienced in maintaining a normal liquid level in the reservoir when the vehicle in which the carburetor is used is subject to excessive jarring, as when 16 passing over rough roads. This difficulty is brought about mainly because of the fact that the float which rides upon the liquid in the reservoir and which actuates the liquid inlet valve is arred from its normal position relative to the liquid level, with the result that the carburetor becomes flooded.

By means of the present invention these difficulties are eliminated in that the position of the float, relative to the liquid level, is at all times substantially the same, and although the carburetor may besubjected to severe jarring forces, normal operation of the inlet valve is maintained and flooding of the reservoir prevented. Additional features of the invention reside in its simplicity of construction and dependability in operation. V

Other advantages of the invention'will be made apparent in the following description and the referred drawings, in which:

Figure 1 is a plan viewof an embodiment of the invention;

Fig. 2 is a longitudinal section on line 2-2 of Fig. 1; and

Fig. 3 is a section onv line 33 of Fig. 2.

It will be understood that the use of the present device is not limited. to any one type] of carbureton' Also, the reservoir may not necessarily be of the separate construction illustrated, but may be formed integrally with other parts of a carburetor with whichit is suitable for use. 'The illustrated embodiment of the invention is therefore typical, and its 1928. .Serial No. 288,398;

flange 12. Flange 12 is shown merely as a typical means for connecting the reservoir to any other carburetor portion (not shown),

for instance, one containing a fuel mixing being securely fastened to the body by means of screws 16 A cover 16 having a liquid inlet 17 and an interior compartment or space S, is mounted upon the head as at 18. Within space S is a conical shaped screen or filter 18 held at its outer periphery between the head and coverand extending around stud bolt 20, the latter being screwed into a central threaded bore 21 in the head by means of nut 22, integral with the bolt, and extending through bore 23 in the cover. The cover is brought into tight engagement with the screen and gasket 13 by screwing nut 19 downwardly on stud bolt 20. Within the chamber and spaced in close proximity (say g inch) to the wall thereof, as at 25, is a spherical float 26, this float being adapted to actuate valve means for controlling the flow of inlet liquid to the chamber, which means will now be described.

Extending through the head and offset from the center thereof is a threaded bore 27.

' Screwed into the bore is a valve seat bushing 28 having at its upper end a port 29. Although the head may be drilled to provide a bore similar to the bushing bore 30 and any opening similar to port 29 in the bushing, for purposes ofconstruction I prefer to form these parts in the manner'described. Pivotally mounted on horizontal pin 32, supported on the underside of the head by means of bosses 33 (one only being shown) is a lever 34, extending beneath bore 30 and resting upon the uppermost surface of float 26. Within bore 30 is a vertically movable valve pin 31 resting at its lower end on lever 34.

The valve pin is seen to have faces or flats31 spaced from the bore wall to provide passageways 35, and to have its upper end shaped conically to project into port 29 and to seat on shoulder 28 around the'port. It is evident that when the valve is in open position as indicated in Fig. 2, liquid in inlet 17 or space S has access to chamber C through aperture 29 and spaces 35. hen float 26 rises in the chamber, pin 31 obviously is actuated by lever 3a and caused to seat at its upper tapered end portion on shoulder 28. Screwed into opening 12 in the body is a plug 39, which may be removed when it is desired to determine the liquid level in the reservoir through opening 12.

Since there is no positive connection between the float, lever 84, and the valve pin, it is evident that friction between these parts is minimized and that the valve pin action is extremely sensitive to movements of the float. Furthermore this sensitiveness is attained without sacrificing the desirable features of simple, compact and sturdy construction.

It is a feature of particular advantage that the float, by virtue of its position relative to the chamber wall, is not appreciably displaced from its normal position relative to the liquid level in the chamber when the reservoir is subjected to sudden impact or jar. Under operating conditions, the float will be at, or very near, its uppermost position within the chamber, inasmuch as valve 31 need be open but a slight distance to permit the flow of fuel in sufficient amount to compensate for that being withdrawn through passageway 11. Upward movement of the float therefore obviously is limited by the position of lever 34 when the valve pin is seated.

It is evident that for a constantliquid level, downward movement of the float relative to the chamber wall can occur only when accompanied by the upward displacement of liquid between the float and chamber wall. Furthermore a force causing such downward movement must be of more or less extended duration to cause the flow of an appreciable amount of liquid upward through the restricted space 25 between the float and the chamber wall. Therefore should a jarring force act upwardly upon the reservoir tending to cause upward movement of the wall 10 relative to the float, due to inertia of the latter, such a force obviously would be of insufiicient duration to cause appreciable relative motion between the float and wall.

It will be understood the drawings and description are to be considered merely as illustrative of and not restrictive on the broader claims appended hereto, for various changes in design, structure and arrangement may be made without departing from the spirit and scope of said claim.

I claim:

In a carburetor reservoir, a vertically extending cylindrical chamber containing a spherical float in close proximity to the chamber Wall, a circular head mounted at the upper end of said chamber and containing a vertically extending bore oflset from the center thereof, a vertically movable valve pin within said bore having a face spaced therefrom and adapted to seat on a shoulder at the upper end of the bore, a cover for said head and containing a liquid inlet space, and a lever having one end pivotally connected to the under side of said head and having its other end resting on said float, said lever being mounted to extend beneath said bore to support the valve pin.

In witness that I claim the foregoing I have hereunto subscribed my name this 13th day of June, 1928.

EDWVARD A. VVINFIELD. 

